Thank you so much for your great work - the newest updates are exactly what my wishes for the project! The BMS doing his job now with my 128 LiFepo4 Cells for over one year now without an single error till now.
Thank you for pushing the cell limit further, it is helping with a project I'm building. Final cell count when we would be finished will be 224 LFP cells if you ever do another cell count update We are aiming at maxing an 800V inverter (Deye 50k), at 3.57v per cell fully charged (for longevity and additional security)
Hello, I am in the process of completing (during sea transport) two sets of 28 pieces of LiFePo4 173Ah batteries. These two sets (each has a classic LV box) are to initially provide about 2*(28*3.2V) = 179.2V Generally, this is to be an HV battery for the DEYE 20kW HV hybrid inverter In the future, I plan to add more sets. 400V is the voltage level at which I will stop adding. Does your DIY BMS design allow for such a high voltage?
PCB's are nit a problem. Maybe we can think about some changes in the component list to switchover to more easily available components? I want to make DiyBMS system for myself so badly!:)
One question: When I update a FW for controller, is it necessary to update FW in modules too? I did not found this at forum, and search there is a bit complicated. Thank You.
@@StuartPittaway Well, it is third update since 2022, that I did, but why I asking: After last update everything seems OK, but modules (4.40), that was not updated, do not balance, at controller web seems, like modules burns energy, but they do not, even red LED do not lit and temperature of modules do not change. So, I suspect, that modules should be updated to same version of FW.
Hey man, I stumbled across your channel while trying to learn a thing or two about batteries for a problem I have, and I was hoping maybe you or one of your knowledgeable viewers could help me out. (Please excuse me if my English isn't perfect.) I have a Shark Wandvac 2.0 vacuum cleaner without a battery. It originally comes with a 14.4-volt Li-Ion battery, but sadly, where I'm from, you can't buy any replacement batteries for it. The vacuum only has two connectors for the battery, so I asked myself if it would be possible to get a simple 4S1P 14.4V battery pack and connect it to the vacuum cleaner. However, none of the batteries I could find have a BMS built in (apparently, these things are quite necessary to prevent issues like blowing up, so I thought it would be better to have one of those). Now my question is: Is it possible to get one of those battery packs and just solder it to the vacuum, and I'll be good to go? Or do I have to fear my vacuum blowing up on me while using or charging it? I sadly don’t know if the original battery has a BMS (is that even possible with only two connectors?). If not, I'd guess that the necessary protection circuits are built into the vacuum itself and the charger? I hope what I typed out is somewhat comprehensible, and I would be really thankful for a response. Thank you so much in advance!
Hey Stuart thanks for the update! Glad to see you are still making good progress on this project :) I've had some issues with the all in one board I bought from the web store and was wondering if you could point me towards some troubleshooting options? When wired up to my 7s pack, all cells read the correct voltage, but over time cell 3 starts to slowly drop and cell 4 slowly climbs until it hits the max value of 4.5v. I've checked the voltages on the cells at the all in one board connector when it does this and they still read within acceptable values so I'm guessing there is a hardware issue? I posted about this on form as well, but I haven't seen a response yet
Hi there, I see you're doing a god's work in there! I'm looking for a way to construct an 144S strictly monitoring-only system just to feed the data to the inverter. The MCU choice you made seems genius, could you recommend what sort of data path topology or isolator chip would be cheap and safe?
1 Cycle is charge and discharge, that means you should use a total energy 4,704+4,250=8,954MWh in 4:58 , not from only charge process ? 4750kWh is a Chargne energy, not Total energy...?
does the external shunt need a fw upgrade for this soc calculation fix? are the random controller reboots on loosing wifi fixed now in this one or was this only fixed in the experimantal fw 2024-02-06-14-07_experimental_bugfix wifi 276 i have this experimental fw and no reboot issues, dont want to have them again thanks Stuart
@@mosfetkiller3851the soc change is only for the on board current monitor. Can I ask you to test this version with the WiFi problem and see what happens? I don't get those problems so would love somebody to confirm is ok
@@StuartPittaway i can test this firmware and tell you if a problem exist with reboot. but can you update the firmware of the external shunt for de soc calculation please? thanks
@@StuartPittaway i have now running the new fw no reboot on loosing wifi signal for now, i keep testing and wil let you know in a week. can you please update the external shunt firmware for the soc calculation? thanks
I really struggle to wrap my mind around what could be going on in your life that is MORE important than the production and distribution of this product. You apparenly don't realize what you have here. In my opinion it is foolish to not dedicate all of your energy to the improvement, production and distribution of this product ASAP everything else takes a backseat
Thank you so much for your great work - the newest updates are exactly what my wishes for the project!
The BMS doing his job now with my 128 LiFepo4 Cells for over one year now without an single error till now.
Great update! Can’t wait to try it out on my boat :-)
Thank you for pushing the cell limit further, it is helping with a project I'm building.
Final cell count when we would be finished will be 224 LFP cells if you ever do another cell count update
We are aiming at maxing an 800V inverter (Deye 50k), at 3.57v per cell fully charged (for longevity and additional security)
Good job, best regards, Leszek
Thank you
Thank you for the new release, I am very happy ❤
Enjoy!
@@StuartPittaway
I now have the release running on 3 installations without any problems. Thx
Hello,
I am in the process of completing (during sea transport) two sets of 28 pieces of LiFePo4 173Ah batteries.
These two sets (each has a classic LV box) are to initially provide about 2*(28*3.2V) = 179.2V
Generally, this is to be an HV battery for the DEYE 20kW HV hybrid inverter
In the future, I plan to add more sets.
400V is the voltage level at which I will stop adding.
Does your DIY BMS design allow for such a high voltage?
Technically it can support high voltage, however I recommend staying below 50V for safety reasons
Really excellent work. Thanks!
Good to hear from you! Tjank you for the update❤
Thanks for watching
is there a new bom spl etc for the changes. the one i uploaded still had th for jumpers.. shame on 4 parts out of stock.
Everything should be on GitHub, those are the files I use to build boards.
I went to order parts from jlcpcb but they had some part stock shortages. 😔
@@WillThat yes, that's the problem I keep running into, which is why I can't realistically run the shop properly
@@StuartPittaway Is there a way to make like a group buy in order to have enough supply of Both the PCB's and components ?
PCB's are nit a problem. Maybe we can think about some changes in the component list to switchover to more easily available components? I want to make DiyBMS system for myself so badly!:)
One question: When I update a FW for controller, is it necessary to update FW in modules too? I did not found this at forum, and search there is a bit complicated. Thank You.
It depends on the changes. For this particular release you only need to update the controller.
@@StuartPittaway Well, it is third update since 2022, that I did, but why I asking: After last update everything seems OK, but modules (4.40), that was not updated, do not balance, at controller web seems, like modules burns energy, but they do not, even red LED do not lit and temperature of modules do not change. So, I suspect, that modules should be updated to same version of FW.
@@pevan73 if you've not updated in a while it is best to do all the modules as well.
@@StuartPittaway OK, thank You very much. I will do update ASAP 🙂
Hey man,
I stumbled across your channel while trying to learn a thing or two about batteries for a problem I have, and I was hoping maybe you or one of your knowledgeable viewers could help me out. (Please excuse me if my English isn't perfect.)
I have a Shark Wandvac 2.0 vacuum cleaner without a battery. It originally comes with a 14.4-volt Li-Ion battery, but sadly, where I'm from, you can't buy any replacement batteries for it.
The vacuum only has two connectors for the battery, so I asked myself if it would be possible to get a simple 4S1P 14.4V battery pack and connect it to the vacuum cleaner. However, none of the batteries I could find have a BMS built in (apparently, these things are quite necessary to prevent issues like blowing up, so I thought it would be better to have one of those).
Now my question is: Is it possible to get one of those battery packs and just solder it to the vacuum, and I'll be good to go? Or do I have to fear my vacuum blowing up on me while using or charging it? I sadly don’t know if the original battery has a BMS (is that even possible with only two connectors?). If not, I'd guess that the necessary protection circuits are built into the vacuum itself and the charger?
I hope what I typed out is somewhat comprehensible, and I would be really thankful for a response.
Thank you so much in advance!
Hey Stuart thanks for the update! Glad to see you are still making good progress on this project :) I've had some issues with the all in one board I bought from the web store and was wondering if you could point me towards some troubleshooting options? When wired up to my 7s pack, all cells read the correct voltage, but over time cell 3 starts to slowly drop and cell 4 slowly climbs until it hits the max value of 4.5v. I've checked the voltages on the cells at the all in one board connector when it does this and they still read within acceptable values so I'm guessing there is a hardware issue? I posted about this on form as well, but I haven't seen a response yet
@@NoahD123 best to open a support ticket on GitHub - easier to discuss on there
@@StuartPittaway will do, thanks Stuart
Hi there, I see you're doing a god's work in there!
I'm looking for a way to construct an 144S strictly monitoring-only system just to feed the data to the inverter.
The MCU choice you made seems genius, could you recommend what sort of data path topology or isolator chip would be cheap and safe?
That's a lot of cells! If you take a look at the MAX range of cell voltage measurement chips, they have inbuilt isospi isolation
1 Cycle is charge and discharge, that means you should use a total energy 4,704+4,250=8,954MWh in 4:58 , not from only charge process ? 4750kWh is a Chargne energy, not Total energy...?
@@SiBex_ovh agreed, if you notice I put the same value in both amp in and out , the calculation in the BMS does the logic.
does the external shunt need a fw upgrade for this soc calculation fix?
are the random controller reboots on loosing wifi fixed now in this one or was this only fixed in the experimantal fw 2024-02-06-14-07_experimental_bugfix wifi 276
i have this experimental fw and no reboot issues, dont want to have them again
thanks Stuart
@@mosfetkiller3851the soc change is only for the on board current monitor.
Can I ask you to test this version with the WiFi problem and see what happens? I don't get those problems so would love somebody to confirm is ok
@@StuartPittaway i can test this firmware and tell you if a problem exist with reboot.
but can you update the firmware of the external shunt for de soc calculation please?
thanks
@@StuartPittaway i have now running the new fw no reboot on loosing wifi signal for now, i keep testing and wil let you know in a week.
can you please update the external shunt firmware for the soc calculation?
thanks
@@mosfetkiller3851 fantastic thanks for testing.
@@StuartPittaway the new fw is running for 9 days now, no reboots on loosing wifi signal.
Nooooo. Please, reopen your shop for God sake!😂❤
Lol, apologies! No stock.
I really struggle to wrap my mind around what could be going on in your life that is MORE important than the production and distribution of this product. You apparenly don't realize what you have here. In my opinion it is foolish to not dedicate all of your energy to the improvement, production and distribution of this product ASAP everything else takes a backseat
tbh I'm kind of upset that there's no way to buy this. I guess I'll just keep getting ripped off using unreliable china crap...
Jeez what do you expect him to do. It's not his fault that there is a global chip supply shortage. The man is a legend already.
@DouglasAden it's called being able to run a business. Having a good idea means nothing if you don't have the means to distribute it